Why does the hydraulic cylinder of a four-column hydraulic press expand?

First of all, this has something to do with the hydraulic cylinder of the four-column hydraulic machine itself. The slender cylinder barrel of the hydraulic cylinder is most likely to expand. Since the strength and stiffness are distributed in a parabolic state, expansion occurs mostly in the highest working pressure chamber of the four-column hydraulic machine. near the middle point, which is proportional to the distribution pressure of the working oil. The editor recommends that hydraulic press manufacturers pay attention to calibrating the strength and stiffness of the hydraulic cylinder when designing the hydraulic cylinder; secondly, the material of the hydraulic cylinder of the four-column hydraulic press, and whether the structural design is reasonable, the material is Essentially, if the material is inferior or has low strength, it is conceivable that the safety performance cannot be guaranteed. Once the four-column hydraulic press is used for a long time, the hydraulic cylinder bore will expand, and there is no reinforcement hoop installed in the middle. Will reduce the hydraulic cylinder's ability to withstand load forces.
The correct operation of a four-column hydraulic press is a safety prerequisite. At high speed or with a large load, the piston of the hydraulic press has a relatively large inertia and stops working instantly. The pressure in the chamber will increase sharply and exceed the maximum working pressure, causing the hydraulic cylinder to expand; there are also operations that do not follow the regulations. Four-column hydraulic presses are often under load. If the hydraulic cylinder buffer device fails and is in an open state, the piston cannot decelerate and hits the cylinder head, causing overpressure. This is a very dangerous situation, and everyone must pay more attention to it.